The Compost Mound's special move is called Generate Compost, and is activated by using a Generate compost scroll. It fills a nearby compost bin with compost, with a chance of creating supercompost. This chance is of ~1/10.

Using the Compost Mound's special move, a player can train farming by buying buckets from a nearby General Store and filling a nearby compost bin. Each regular compost yields 4.5 experience per bucket or 67.5 experience for the entire compost bin. If you are lucky you get 8.5 experience per supercompost or 127.5 for the entire compost bin. This can be repeated many times while waiting for your crops to grow.

If making pouches in Taverley then compost can be stored with the nearby leprechaun and many pouches can be made quickly.